Nick Reiner, the son of filmmaker Rob Reiner, made his initial court appearance in Los Angeles on Wednesday, facing charges of first-degree murder for allegedly killing his parents.

The 32-year-old, dressed in a jail-issued suicide prevention gown and shackled, appeared behind a glass partition in the custody area. He did not enter a plea during this appearance.

At the request of his defense attorney, the arraignment was postponed until January 7. Reiner spoke briefly, only to confirm the new date by responding, “Yes, your honor.”

Following the court session, Reiner’s lawyer, Alan Jackson, described the situation as “a devastating tragedy for the Reiner family” and noted the case’s complexity.

“We urge everyone to allow the legal process to unfold as it is intended,” Jackson stated to reporters outside the courthouse.

“Not with a rush to judgment, not with jumping to conclusions.”

Jackson declined to answer shouted questions from dozens of reporters surrounding him.

Nick Reiner was charged Tuesday with killing the 78-year-old actor and director Rob Reiner and his wife, Michele Singer Reiner.

“Their loss is beyond tragic and we will commit ourselves to bringing their murderer to justice,” Los Angeles County District Attorney Nathan Hochman said at a Tuesday news conference with LA Police Chief Jim McDonnell.

The two counts of first-degree murder come with special circumstances of multiple murders and an allegation that the defendant used a dangerous weapon, a knife. The additions could mean a greater sentence.

Hochman said his office has not yet decided whether to seek the death penalty in the case. Reiner is being held without bail.

“This case is heartbreaking and deeply personal, not only for the Reiner family and their loved ones but for our entire city,” McDonnell said.

The charges came two days after the couple was found dead from apparent stab wounds in their home in the upscale Brentwood neighbourhood on the west side of Los Angeles.

Nick Reiner did not resist when he was arrested hours later in the Exposition Park area near the University of Southern California, about 14 miles (22.5 kilometres) from the crime scene, police said.

Rob Reiner was the Emmy-winning star of the sitcom “All in the Family” who went on to direct films including “When Harry Met Sally…” and “The Princess Bride.” He was an outspoken liberal activist for decades. Michele Singer Reiner was a photographer, movie producer and advocate for LGBTQ+ rights. They had been married for 36 years.

Several of those closest to them, including actors Billy Crystal, Albert Brooks, Martin Short and Larry David, released a statement mourning and celebrating the couple on Tuesday night.

“They were a special force together — dynamic, unselfish and inspiring,” the statement said.

“We were their friends, and we will miss them forever.”

Nick Reiner had been scheduled to make an initial court appearance on Tuesday, but his attorney said he was not brought from the jail to the courthouse for medical reasons and the appearance was postponed to Wednesday.

Jackson is a high-profile defense attorney and former LA County prosecutor who represented Harvey Weinstein at his Los Angeles trial and Karen Read at her intensely followed trials in Massachusetts. He was a central figure in the HBO documentary on the Read case.

On the other side will be Deputy District Attorney Habib Balian, whose recent cases included the Menendez brothers’ attempt at resentencing and the trial of Robert Durst.

Authorities haven’t said anything about a motive for the killings and would give few details when asked at the news conference.

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